Doig Formation

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Doig Formation Stratigraphic range: middle Anisian to Ladinian PreЄ Є O S D C P T J K Pg N
Type	Geological formation
Underlies	Halfway Formation
Overlies	Montney Formation
Thickness	up to 190 metres (620 ft)^[1]
Lithology
Primary	Siltstone, Shale
Other	Phosphate, Sandstone
Location
Coordinates	56°34′18″N 121°13′19″W / 56.57159°N 121.2219°W / 56.57159; -121.2219
Region	NW Alberta NE British Columbia SE Yukon
Country	Canada
Type section
Named for	Doig River
Named by	J.H. Armitage, 1962

The Doig Formation is a stratigraphical unit of middle Triassic age in the Western Canadian Sedimentary Basin.

It takes the name from Doig River, a tributary of the Beatton River, and was first described in the Texaco N.F.A. Buick Creek No. 7 well (located north-west of Fort St. John, east of the Alaska Highway) by J.H. Armitage in 1962. .^[2]

Lithology

The Doig Formation is composed of argillaceous siltstone and dark calcareous shale. ^[1] Nodular phosphates occur at the base of the formation. Porous sandstone channels and bars are present locally towards the top of the formation in the northern areal.

Hydrocarbon production

Natural gas is extracted from the Doig Formation in the western Montney trend and in the Peace River Arch.

Distribution

The Doig Formation reaches a maximum thickness of 190 metres (620 ft) in the Canadian Rockies foothills it thins towards the north and east. It occurs in the sub-surface in north-western Alberta, north-eastern British Columbia and southern Yukon, from 53ºN and 118ºW to the Canadian Rockies.^[1]

Relationship to other units

The Doig Formation is unconformably overlain by the Halfway Formation of the Schooler Creek Group. The contact is marked by a dolomitic bed and a chert and quartz conglomerate bed.^[3] Westwards it is overlain by newer Jurassic beds. It conformably overlays the Montney Formation, which rests under the phosphate pellet bed located in the base of the Doig.^[1]

The formation correlates with the lower Llama Member of the Sulphur Mountain Formation in the southern ranges of the Canadian Rockies, with the Whistler Member of the Whitehorse Formation in the Muskwa Ranges, and with the Toad Formation in the upper Liard River area.

References

↑ 1.0 1.1 1.2 1.3 Lexicon of Canadian Geologic Units. "Doig Formation". Retrieved 2009-03-21.
↑ Armitage, J.H., 1962. Triassic oil and gas occurrences in northeastern British Columbia, Canada. J. Alberta Society of Petroleum Geologists, v. 10, p. 35-36.
↑ Lexicon of Canadian Geologic Units. "Halfway Formation". Retrieved 2009-03-21.

v t e Western Canadian Sedimentary Basin

Hydrocarbon history	Oil sands and heavy oil Frontier exploration and development Natural gas liquids Natural gas

Depositional Regions	Southern Alberta Central Alberta Northwestern Alberta Plains South-central Canadian Rockies foothills North-east Plains North-central foothills Liard River Fort Nelson Northern Rocky Mountains Fort St. John Saskatchewan Western Manitoba

Northwest Plains	Paskapoo FM Scollard FM Wapiti GRP Smoky GRP Puskwaskau FM Badheart FM Muskiki FM Cardium FM Kaskapau FM Pouce Coupe MBR Doe Creek MBR Dunvegan FM Fort St. John GRP Shaftesbury FM Peace River FM Spirit River FM Bullhead GRP Bluesky FM Gething FM Cadomin FM Nikanassin FM Fernie GRP Rock Creek MBR Poker Chip Shale Nordegg MBR Schooler Creek GRP Baldonnel FM Charlie Lake FM Halfway FM Doig FM Montney FM Belloy FM Stoddart GRP Taylor Flat FM Kiskatinaw FM Golata FM Rundle GRP Debolt FM Shunda FM Pekisko FM Banff FM Exshaw FM Wabamun FM Trout River FM Kakisa FM Redknife FM Jean Marie MBR Woodbend GRP Irteton FM Fort Simpson FM Leduc FM Duvernay FM Cooking Lake FM Beaverhill Lake GRP Waterways FM Swan Hills FM Fort Vermilion FM Elk Point GRP Watt Mountain FM Gillwood MBR Presqu’ile FM Sulphur Point FM Pine Point FM Muskeg FM Zama MBR Black Shale Keg River FM Rainbow MBR Chinchaga FM Cold Lake FM Ernestina FM Basal Red Beds Granite Wash Canadian Shield

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